What Explains Forest Grouse Mortality: Predation Impacts of Raptors, Vole Abundance, or Weather Conditions?
Figure 1
Density of the black grouse hens in August counts (a), weight proportions, hens in the diet of the goshawk (b), density of black grouse chicks in August counts (c), weight proportions of chicks in the diet of the goshawk (d) in South Ostrobothnia and Oulu regions during 1985–2007.
